Pet pool



FIG. 1 is a perspective view of a pet pool showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is bottom plan view thereof.

The broken lines illustrate portions of the pet pool that form no part of the claimed design. 

CLAIM The ornamental design for a pet pool, as shown and described. 